Hop-extracting apparatus.



PATENTED MAR. 31, 1908.

F. s. DAVIDSON & w. P.-BURRA.

HOP BXTRAOTING APPARATUS.

APPLICATION FILED APE.19.1907.

UNITED STATES PATENT OFFICE.

FRANCIS SYDNEY DAVIDSON AND WILLIAM POMFRET BURRA, OF ASI-IFORD,ENGLAND.

HOP-EXTRACTING APPARATUS.

Nassaws.

Specification of Letters Patent.

Patented March 31, 1908.

Application filed April 19, 1907. Serial No. 369,176.

To all whom it may concern:

Be 1t known that we, FRANCIS SYDNEY DAVIDSON and WILLIAM POMFRET BURRA,

both citizens of the United Kingdom of Great Britain and Ireland, andboth residents of Ashford, Kent, England, have invented a certain newand useful Improved Hop-EX- tracting Apparatus, of which the followingis a specification, such as will enable others skilled in the art towhich it appertains to make and use the same.

Our improved apparatus is designed to obtain a better extract from hopsthan is possible with the boiling and other apparatus,

now in use, as well as to simplify the process.

. suitable ind is fitted to the case and means are provided for closelysecuring it to the case. One or more steam pipes or steam inlets arearranged in or fitted to the case in such a manner that it can bequickly and evenly filled with steam generated from outside the case.The holder can be conveniently made with a central perforated tubedesigned to fit around a perforated steam pipe introduced through thebottom of the case, and carried up the center of it. A safety valve isfitted to the cover or other part of the apparatus and one or more drawoff cocks, or their equivalents are arranged in convenient positions.erably closed by a hand screw fitted on a bar pivoted to two side armsmounted on pins or trunnions on the outside of the case. The lower endof the hand screw carries a frame, such as a tripod or four legs towhich is attached a circular metal ring which serves to press down thecover in an even and secure manner.

IVhen the hand screw is released it can be swung away to one side withthe side arms and bar, thus giving free access to the interior of thecase, and allowing the holder to be raised out of it. A plate shaped tofit within the holder and to be pressed by the ring of The cover ispref-' case.

the hand screw is provided to compress the hops when desired. The hopsare placed into the holder, which isthen arranged in the case and thecover fixed in position after which the supply of steam is turned on,and the apparatus is left for such time as is necessary to procure theextract. A steam pressure of about 25 lbs. and a period of about 1%hours are all that is generally required. The steam having been shut offthe cover is removed and the hops are squeezed down under the plate bythe hand screw after which the holder can be lifted out and the hopsemptied into the brewery copper and boiled in the usual way.

We will now describe our invention with reference to the accompanyingdrawings in which I c Figure 1 is a sectional elevation of an extractingapparatus, constructed according to our invention in which the cover isin position, and is shown held down by the hand screw. Fig. 2 is a viewpartly in section of the top of a similar apparatus and shows the coverremoved and the inner plate being pressed down by the hand screw. Thedotted lines indicate the position taken by the hand screw and itssupports when swung to one side.

In these drawings a is the outer case mounted on legs a. holder, and cthe space between a and b.

The holder l) is provided with lifting rings (1.

e is the cover of the case.

A perforated steam pipe f is centrally arranged in a tubular perforatedpassage in the holder 6. The steam for pipef can be supplied from anyconvenient source. A hand wheel 9 is mounted on bar h which is pivotallyattached at 'L to the side arms j, which are mounted on joints ortrunnions is on the Stops Z serve to limit the movement in one directionof the bars 7'. Attached to the hand wheel 9 is a frame m, which carriesring a and serves to press down the cover 6 or when the latter isremoved the plate 0.

p and g are respectively the safety valve and the draw-off cock. In Fig.2 the hops t are shown being pressed down by the plate 0.

It must be understood that our improved extractingapparatus can be madeof any suitable size and shape and that the steam can be conveyed irttoit through any convenient pipes or inlets. One casing can be arranged tohold several'hop holders which can be removed horizontally, verticallyor in any convenient way. The steam permeates thoroughly through thehops and extracting the flavor and essence condenses and falls to thebottom of the case, where it is drawn ofi by the tap q or itsequivalent.

While this apparatus is designed for use in treating hops to form anextract thereof in which the more volatile and aromatic oils are fixedin a liquid form, instead of being dissipated in the air when boiled inthe ordinary manner, the same may be used for other herbs, barks, roots,etc., with great efficiency.

What we claim and desire to secure by Letters Patent is:

In a device of the class described, a casing open at the top, aremovable perforated walled holder for the material within the casingout of contact with the side and bottom walls of the casing, a centralperforated pipe forming the inner annular wall of the holder concentricwith the outer wall of the holder, a perforated steam pipe within thecentral pipe of the holder passing through the wall of the casing, anannular press-plate in the holder, a cover for the casing, and means forforcing the cover down onto the casing and for forcing the press-platedown into the holder.

In witness whereof we have hereunto set our hands in presence of twowitnesses.

FRANCIS SYDNEY DAVIDSON. WM. POMFRET BURRA.

Witnesses:

W. J. SKERTEN, J. P. CRAWLEY.

